#!/bin/sh

set -eu

IMAGE_REPO="${IMAGE_REPO:-ghcr.io/gnosyslabs/synapsis}"
PACKAGE_API="${PACKAGE_API:-/orgs/GnosysLabs/packages/container/synapsis/versions?per_page=100}"
BUILDER="${BUILDER:-}"
PLATFORMS="${PLATFORMS:-linux/amd64,linux/arm64}"
DATE_PREFIX="${DATE_PREFIX:-$(date -u +%Y.%m.%d)}"
SOURCE_REPO="${SOURCE_REPO:-https://github.com/GnosysLabs/Synapsis}"
PRUNE_BUILD_CACHE="${PRUNE_BUILD_CACHE:-1}"
APP_VERSION="${APP_VERSION:-}"
EXTRA_TAGS="${EXTRA_TAGS:-}"

require_command() {
    if ! command -v "$1" >/dev/null 2>&1; then
        echo "❌ Required command not found: $1" >&2
        exit 1
    fi
}

require_command docker
require_command gh
require_command git

CURRENT_SHA="$(git rev-parse --short HEAD)"
CURRENT_FULL_SHA="$(git rev-parse HEAD)"
BUILD_DATE="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
GITHUB_URL="${SOURCE_REPO}/commit/${CURRENT_FULL_SHA}"

if [ -z "${APP_VERSION}" ]; then
    existing_tags="$(
        gh api "${PACKAGE_API}" --paginate --jq '.[].metadata.container.tags[]?' 2>/dev/null || true
    )"

    max_build=0
    for tag in ${existing_tags}; do
        case "${tag}" in
            "${DATE_PREFIX}".*)
                build_number="${tag##${DATE_PREFIX}.}"
                case "${build_number}" in
                    ''|*[!0-9]*)
                        ;;
                    *)
                        if [ "${build_number}" -gt "${max_build}" ]; then
                            max_build="${build_number}"
                        fi
                        ;;
                esac
                ;;
        esac
    done

    next_build=$((max_build + 1))
    APP_VERSION="${DATE_PREFIX}.${next_build}"
fi

BUILD_ARGS="
  --platform ${PLATFORMS}
  --build-arg APP_VERSION=${APP_VERSION}
  --build-arg APP_COMMIT=${CURRENT_FULL_SHA}
  --build-arg APP_BUILD_DATE=${BUILD_DATE}
  --build-arg APP_GITHUB_URL=${GITHUB_URL}
  --build-arg APP_IMAGE_REPO=${IMAGE_REPO}
  --build-arg APP_SOURCE_REPO=${SOURCE_REPO}
"

TAG_ARGS="
  -t ${IMAGE_REPO}:latest
  -t ${IMAGE_REPO}:${APP_VERSION}
  -t ${IMAGE_REPO}:${CURRENT_SHA}
"

for extra_tag in ${EXTRA_TAGS}; do
    TAG_ARGS="${TAG_ARGS}
  -t ${IMAGE_REPO}:${extra_tag}"
done

echo "========================================"
echo "  Synapsis Docker Publish"
echo "========================================"
echo "  Version: ${APP_VERSION}"
echo "  Commit: ${CURRENT_SHA}"
echo "  Build Date: ${BUILD_DATE}"
echo "  Image: ${IMAGE_REPO}"
echo "  Platforms: ${PLATFORMS}"
echo "========================================"

set -- docker buildx build

if [ -n "${BUILDER}" ]; then
    set -- "$@" --builder "${BUILDER}"
fi

# shellcheck disable=SC2086
set -- "$@" $BUILD_ARGS -f docker/Dockerfile
# shellcheck disable=SC2086
set -- "$@" $TAG_ARGS --push .

"$@"

echo ""
echo "✅ Published:"
echo "  ${IMAGE_REPO}:latest"
echo "  ${IMAGE_REPO}:${APP_VERSION}"
echo "  ${IMAGE_REPO}:${CURRENT_SHA}"

for extra_tag in ${EXTRA_TAGS}; do
    echo "  ${IMAGE_REPO}:${extra_tag}"
done

if [ "${PRUNE_BUILD_CACHE}" = "1" ]; then
    echo ""
    echo "🧹 Pruning BuildKit cache"
    if [ -n "${BUILDER}" ]; then
        docker buildx prune --builder "${BUILDER}" -af >/dev/null
    else
        docker buildx prune -af >/dev/null
    fi
fi